Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses

47265 Products showing for Fuses & Circuit Breakers

2241 of 999+
Better World
Schneider Electric Acti 9 A9N1 MCB, 4P, 100A Curve B
  • RS Stock No. 219-8287
  • Mfr. Part No. A9N18436
Each
HK$5,064.80
SIBA 20A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 768-6112
  • Mfr. Part No. 5022526.20
Each
HK$82.20
Eaton, Eaton Moeller Series NZM MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 231-222
  • Mfr. Part No. 109674 NZMH3-A400
Each
HK$22,516.99
Better World
Siemens, SENTRON Circuit breaker 4P 250A, DIN Rail Mount
  • RS Stock No. 224-7906
  • Mfr. Part No. 3VA1225-5GF42-0AA0
Each
HK$12,535.60
Schurter 4A M Glass Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 865-7405
  • Mfr. Part No. 0034.2522
Each (In a Pack of 10)
HK$10.77
Hager 6A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 250-8598
  • Mfr. Part No. LF306M
Each (In a Pack of 10)
HK$40.125
Eaton Eaton Moeller IZMX/INX Communication Module for use with IZMX
  • RS Stock No. 246-491
  • Mfr. Part No. 186877 IZMX-CAM-CAB-1
Each
HK$750.57
Mersen 6.3A 5SF Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 816-8927
  • Mfr. Part No. V090523
Each (In a Pack of 10)
HK$3.16
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-4410
  • Mfr. Part No. 1SDA072591R1
Each
HK$265,081.20
Eaton 350A Tag Fuse, 201.4 x 91 x 91mm, 1.5kV, 205mm
  • RS Stock No. 282-6237
  • Mfr. Part No. PV-350A-3L-15
Each
HK$4,697.15
RS PRO 315A Solid Link for B3 Fuses
  • RS Stock No. 242-1099
Each
HK$183.70
ABB 80A Tag Fuse, 150 x 40 x 72mm, 500V
  • RS Stock No. 250-4437
  • Mfr. Part No. 1SCA022697R8540
1 Box of 3
HK$1,235.00
ABB F200 RCCB, 40A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 231-9899
  • Mfr. Part No. 2CSF202101R1400 F202 A-40/0.03
1 Box of 1
HK$1,630.50
Eaton xEffect FAZ MCB, 4P, 15A Curve D, 240V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 239-791
  • Mfr. Part No. 190836 FAZ-D15/4-NA
Each
HK$2,613.50
ABB S402M MCB, 2P, 16A Curve B, 12V AC, 10 kA Breaking Capacity
  • RS Stock No. 140-308
  • Mfr. Part No. 2CCS572001R0165
Each
HK$1,282.79
Eaton 400A NH Fuse, NH3, 690V ac
  • RS Stock No. 181-8644
  • Mfr. Part No. 400NHG3B-690
Each
HK$267.28
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 250A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 260-480
  • Mfr. Part No. 3VA6225-7JT41-2AA0
Each
HK$28,206.70
RS PRO 4A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9995
Each (In a Pack of 10)
HK$3.27
Better World
ABB, Tmax XT MCCB 4P 25A, Fixed Mount
  • RS Stock No. 236-6503
  • Mfr. Part No. 1SDA067960R1 XT2L 160 Ekip LSI 25A FF
Each
HK$12,948.20
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 125A, Breaking Capacity 4 kA, Plug In
  • RS Stock No. 229-544
  • Mfr. Part No. 113231 NZMC2-4-A125-SVE
Each
HK$11,551.47
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